This view is from a mile north of the very southwest corner of the United States at the southern end of Imperial Beach, south of San Diego, CA. The tidal marsh at left is the Tijuana Estuary Reserve which drains into the seasonal Tijuana River at its outlet to the Pacific Ocean just south of this sand ridge. The Tijuana River's watershed is largely in Mexico. The US/Mexico border cuts along the top edge of the low hills in the distance. Closer views of the border can be seen in these Gigapans:
www.gigapan.org/viewGigapan.php?id=4317www.gigapan.org/viewGigapan.php?id=4318